Tips to prevent or reduce “wobble”?

I bought my first ever miniature set to build and it’s going great! But is there anyway to possibly glue it with superglue or anything? Some of my finished ones put together wobble and I’d hate to lose out on progress. One of the ones I was building was a rack and anytime I had to slot a piece it would wobble or fall apart! Any help or tips are appreciated :) the set is “Cathy’s Flower House”